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Hydraulics and Fluid Mechanics in ME

Hydraulics and Fluid Mechanics in ME
In one dimensional flow, the flow

Takes place in curve
Takes place in one direction
Is steady and uniform
Takes place in straight line

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Hydraulics and Fluid Mechanics in ME
Head developed by a centrifugal pump depends on

Speed
Impeller diameter
Both (A) and (B) above
Fluid density

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Hydraulics and Fluid Mechanics in ME
According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

AC × √(m × i)
A × √(m × i)
C × √(m × i)
mi × √(A × C)

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Hydraulics and Fluid Mechanics in ME
Centre of pressure compared to e.g. is

at same point
above it
below it
above or below depending on area of body

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Hydraulics and Fluid Mechanics in ME
The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

w × Q × hf
w × Q (H + hf)
w × Q (H - hf)
w × Q × H

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Hydraulics and Fluid Mechanics in ME
A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

equal
less
less at low temperature and more at high temperature
more

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